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Effect of measurement time of the day on the relationship between temperature and soil CO2 Efflux
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SYSNO ASEP 0366890 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Effect of measurement time of the day on the relationship between temperature and soil CO2 Efflux Author(s) Dařenová, Eva (UEK-B) RID, ORCID, SAI
Pavelka, Marian (UEK-B) RID, ORCID, SAI
Janouš, Dalibor (UEK-B) RID, SAINumber of authors 3 Source Title Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis. - : Mendelova univerzita - ISSN 1211-8516
Roč. 59, č. 6 (2011), s. 127-133Number of pages 7 s. Language eng - English Country CZ - Czech Republic Keywords soil CO2 efflux ; R10 ; Q10 ; Picea abies ; seasonal carbon flux Subject RIV EH - Ecology, Behaviour R&D Projects SP/2D1/70/08 GA MŽP - Ministry of Environment (MŽP) CEZ AV0Z60870520 - UEK-B (2005-2011) Annotation In this study we investigated effect of the time of the day when manual measurements of soil CO2 efflux are performed on estimates of seasonal sums of released carbon from the soil. We subsampled continuous measurement of soil CO2 efflux into six sets of data– 0 h, 4 h, 8 h, 12 h, 16 h and 20 h. To estimate seasonal carbon flux from the soil we used continuously measured soil temperature and parameters R10 and Q10 calculated from continuous measurements and from measurements taken at individual hours. Q10 calculated from 12 h and 16 h data were lower than Q10 calculated from continuous measurements. On the contrary, Q10 at 0 h, 4 h, 8 h and 20 h were higher.Seasonal carbon flux from the soil based on 0 h, 4 h and 8 h measurements was overestimated compare to the flux calculated from continuous measurements. On the contrary, measurements at 12 h, 16 h and 20 h measurements underestimated the carbon flux. The under- or overestimation was significant for 0 h, 4 h, 8 h and 20 h data sets. Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2012
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